Electric motor.



' F. I. (isms.

ELECTRIC MOTOR. I APPLICATION FILED MAR. 26, I915.

Patented Sept. 18, 1917.

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F. J. OSIUS. ELECTRIC MOTOR.

APPLIQATION FILED MAR. 26 19 5.

Patented Sept. 18,1917.

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ATTUR /ZY5 U ED STATES ,PATEN ,FFIcE.

FREDERICK J.. osIUs', or me e, WISCONSIN.

ELECTRIC MOTOR.

Specification of Letters Patent. Patented Sept, 18, 1917,

Application filed March as, 1915. Serial'No. 17,095.

- To all whom it may concern.

,Be it known that I, FREDERICK J. OSIUS,

a citizen of the United States and resident not solely, adapted fordriving sewing ma chines and other light mechanism.

It is one of'the objects of the present in vention to provide anelectric motor of the universal type which is adapted to aut'omati Callyfit and actuate the various makes of sewing machines now on the marketwith out the use. of attachments of any kind.

vA- further object of the invention is to provide an electric motorwhich may be placed upon the stand of a sewingmachine with its drivingpulley in frictional contact with the hand wheelof the sewing machine toactuate the said machine without requir X ing the use of meansforattaching themotor to the stand or other parts; of the machine.

A further object of .the invention is to provide an electric ,motor ofthe .portable typewhich is so-constructed as to automati- Cally adaptitself to fit the various types of machines now on the market and whichmo- .tor will automatically clamp oriexert a presv sure upon the supportto maintain the mo-- tor in a predetermined working position -withrelation to the Wheel of the machine to be driven.

A furtherobject of the invention is to pro vide an electric motor with asupporting frame or base of stepped formation shaped and constructed tofit all of the various styles of sewing machine stands now on themarket. I I

A further object of the invention isto provide an electric motor whichis pivotally,

"- yieldingly mounted upon its support and is provided with a driveadapted to frictionally engage the driving wheel of the mechanism to. beactuated. i A further ob ect of the invention is to provide an electricmotor which is, of simple construction is strong and durable and is welladapted for the purpose described.

With the above and other objects in view, the invention consists of theimproved electric motprand its parts and combinations as set forth inthe claims andall equivalents thereof. I

In the accompanying drawing in which thesame reference charactersindlcate the same parts in all of the views:.

Figure-lis a side view of the improved motor shown mounted upon a sewingma chine stand, the sewing'machme and stand being indicated by dottedlines and a por-.

tion of the motor being'shown in section; Fig. 2 is a vertical sectionalview of the electric motor taken on line 2-2 of Fig. 1;

Fig. 8 is a transverse sectional view taken on line 33 of Fig. 1;

Fig. 4. is an enlarged vertical sectional view of the motor taken online/l4 of 1 ing machine, the-sewing machine being indicated in dottedlines;

Fig. 7. is a vertical sectional view thereof taken on line 66 of Fig. 5;

Fig. 8 is a detail view of a modified form of motor support;

Fig. 9-is a side view of a modified form of electric motor.

. Referring tothe drawingthe numeral 10 indicates asewing machine stand,11 the arm or a portion ofthe frame, 12 the hand or driving wheel ofthesewing machine and 13 the improved electric motor. The improvedelectric'motor comprises in part the stepped curved base or supportingmember 14:, the motor casing 15 and the armature shaftlG journaled insaid casing and extending therethrough at one end. The motor casing inthe preferred form is pivotally connected to the supporting member bymeans of a pivot bolt 17 which is secured at one end to a projection 18of the motor casing and extends transversely and beneath said casing andthrough eyed ears 19 of said supporting member. A screw 20 passingthrough the bolt and entering the projec- ,tion firmly secures the pivotbolt 17 to said projection 18. A coiled spring 21surrounding the boltand interposed between the ears and having one end engaging the bolt andthe other'end bearing against the support serves toyieldingly hold theforward end portion 22 of the motor casing tilted upwardly and theforward portion of the base clampingly pressing downwardly. The projecting end portion of the shaft 16 is provided with a slightly groovedpulley 23 preferably formed of cork orother yielding material.

The motor is placed upon the sewing machine stand with the pulleyfrictionally engaging the lower peripheral edge of the sewing machinehand wheel while under tension of the tilting spring so that when cur-.

rent is switched to the motor the sewing machine will be actuated. Bymeans of the yielding tilting motor construction the pulleyautomatically adjusts itseif to hand 'whe'els at varying heights fromthe stand and thus the motor is adapted to fit all makes of sewingmachines now in use, and the yielding construction also provides for thebase clampingly engaging the support.

In order to prevent the vibration of the sewing machine from causing themotor to v slide out of position on the stand the legs verse thedirectionof rotation of'the armation of the motor is adapted to becontrolled 24 of the base or support are provided with projecting rubberknobs 25 which bear upon the stand. The base at a medial and higherplane or step is also provided with similar knobs 25 which are adaptedto rest upon and engage a stand of'less length than the one shown. lVhenthus used the outer legs will hang over the edge of the stand and therear portion of the base will be supported upon the said knobs 25.

lower contact'plates 3O and-30 which are connected -to-the fieldwindings 31 and 31 of the motor. For convenience in changingthedirection of rotation of the motor the brush holders 32 projectthrough elongated openings 33 provided in the casing, and may be easilymoved by the user.

The brush ring and brushes are held in adjusted positions by means of aset screw 34 which is threaded through the end of the casing and ring 27Electric current is supplied to the motor by wires-34"leading to asource of electrical supply (not shown) and the speed of rotaimpingesagainst the brush in any manner desired.

In the modified form shown in Figs. 6 and 7 the motor casing 15 isrigidly conneeted to the support and the forward legs of the support areprovided with yielding bolts 35 (only one being shown) which serve toyieldingly hold the driving pulley 23 in frictional contact with thesewing machine hand wheel 12 and drive the same, and the forward legsclampingly in engagement with the support of the machine. The yieldingfeature. of the bolts with relation to the support also serves toaccommodate the motor to machines having hand wheels which vary inheight from the stand.

The bolts 35 extend loosely through the legs of the support and aresurrounded with coiled springs 36 which are interposed between the headsof the bolts and the support. The modification illustrated in Fig. 8 issimilar to the form just described with the exception that the bolts 37(only one being shown) are threaded through the support and are turnedto tilt the motor upwardly and the motor pulley 23 yieldingly intoengagement with-the hand wheel of the sewing machine. a k

In this construction the cork or other material of the pulley providesthe yielding engagement between the wheels, and the screws the clampingengagement between the motor and the support of the machine. 1

Another modification is shown in 'Fig. 9 in which the motor is mountedin vertical position and the driving pulley 38 is yieldingly splinedon'the motor shaft 16 and is adapted to be positioned below the handwheel of the machine in the manner shown in Fig. 9. A coiled spring 39surrounding the motor shaft and interposed between the pulley 38 and themotor casing iii serves to yieldingly hold the said pulley in its uppermost position and the base clampingly in engagement with the support. r

In this last mentioned form of motor the speed of rotation of the sewingmachine may be controlled by moving the motor toward or away from thehand wheel 12 thus locating the driving contact closer to or fartherfrom the center of the motor ulley.

While the electric motor as been described as particularly adapted foruse in driving sewing machines it is to be, under,- stood that it mayalso be used in driving other kinds of machine's without departing fromthe spirit and scope of the invention.

In operation it is only necessary to osition the improved motor upon thetab e or support of the mechanism to bh driven with the motor drivingpulley engaging the lower peripheral portion of the wheel of themechanism to be driven. In this osition the driving pulley will beyielding y held up- -wardly in engagement with the wheel and oppositelythe force holding the pulley upwardly will impart a tendency to the baseor support of the motor to clampingly engage the support of'themechanism being driven, thus maintaining the motor in a working positionwithout the necessity of using fastening means or marring the driven-machine in any manner. Asthe pulley of the motor has comparatively aconsiderable range of movement upwardly with relation to its base themotor automatically adjusts itself to suit varying distances betweenframe and wheel in various machines. The stepped formation of the basemember provides for resting the motor upon machine tables or framesvhaving offset portions or planes or upon tables which vary in lengthfrom the machine arm tothe adj acent .outer endofthe table thus formingin substance a'portable, universal motor for operating various types andkinds of machines.

From the foregoing description it will be seen that the invention is ofsimple construc tion and is well adapted for the purpose described. L

1 What Iclaim as "my invention is;

1.. An electric motor, comprising a support having a plurality ofprojecting knobs extending indifferent planes, a motor memtioned on ahigher plane than other of said knobs. a motor member pivotally mounted.the motor'member in a direction toward the ber pivotally mountedthereon and provided with a yielding friction driving pulley, and meansfor yielding-1y tilting the pulley portion of the motor member inadirection toward the wheel to .be driven thereby.

-2. An electric motor, comprising a support having a plurality ofdownwardly projecting knobs, some of said knobs being posion the supportand provided'with a yielding friction driving pulley, and a coiledspring engaging the support and the motor member for'yieldinglytilting-the pulley portion of wheel to befdriven thereby.

3. An electric'motor, comprising a support having a plurality ofdownwardly projecting yielding knobs, some of said knobs beingpositioned on a higher plane than other of said knobs, said support alsoprovided with eyed ears, a motor member having 'a transversely extendingpivot bolt which extends through the eyed ears and pivotally connectsthe motor member to the support, said motor member also having ayielding friction driving pulley, and a coiled spring surroundingthe'piv-ot bolt and having'oneof its ends engaging the support and theother end'enga'ging the motor member for yieldinglytilting the pulleyportion of the .motor member in a direction toward the wheel to bedriven thereby.

.4. An electric motor, comprlsing a base member having a plurality-ofsupport engaging portions extending in difi'erenthorizontal planes, amotor member mounted upon the base member and provided with a drivingpulley, and means for automatically moving the pulley portion of themotor member toward and into driving engagement with the Wheel to bedriven thereby.

5 An electric motor, comprising a base member having a plura ity ofsupport engaging portions extending in difierent horizontal planes,and'a motor member pivotally mounted upon the base member'and pro videdwith a shaft and friction driving pultoward and into direct frictionaldriving engagement with the wheel to, be driven thereby.

6. An electric motor, comprising a base member having a plurality ofsupport engaging portions, some 'ofsaid portions extending in'the samehorizontal plane' and other of said portions extending in a,

difierent horizontal plane, and a motor member pivotally mounted uponthe base a member and provided with a shaft and a friction drivingpulley mounted thereon which is automatically tiltable toward and intodirect frictional driving engagement with the wheel to be driventhereby.

7. An: electric motor, comprising a base ,ley thereonwhich is-automatically'tiltable member having a plurality of support engagingportions extending in difierent horiv zontal planes, a motor memberpositioned above the base member and provided with a shaft and a drivingpulley mounted thereon, a pivot pin pivotally connecting the motormember to the base member, and means for automatically tilting thedriving pulley toward and into direct frictional driving engagement withthe wheel to be driven therebyand for imparting a tendency to the basemember toclampingly engage the support upon which the motor rests.

member having a plurality of support engaging portions extending indiflerent horizontal planes, a motor member positioned above the basemember and provided with a shaft and a driving pulley mounted thereon, apivot pin pivotally connecting the motor member to. the base member, andacoiled spring surrounding the pivot mem-' ber for automatically tiltingthe driving pulley toward and into driving engagement with the wheel tobe'driven thereby and for imparting a tendency to the base member toclampingly engage the support upon which the motor rests.

9. The combination with the frame and the wheel of a machine to bedriven, of a motor member andv its shaft and a driving wheel thereon.and a base member on which the motor member is mounted, said base 8. Anelectric motor, comprlsing a base I motormember and its shaft and adriving .wheel thereon, a base member on which the motor member is.mounted, and means for causing the. base member and the driving .wheelto oppositely engage the machine frame andthe machine wheel toclampingly maintain the driving wheel in engagement with themachinewheel and the base'memher in engagement with the frame.

11;.- The combination withvthe frame and the wheel of a machine to bedriven, of. a

motor member and itsshaft andfa driving wheel thereon, and a base memberon which the motor is yieldingly mounted, saidmotor memberand basemember coacting to cause. the .motor wheelv to yieldingly and drivinglyengage the machinewheel and the motor baseto clampingly engage the frameof the machine.

a the wheel of machine to be driven, Of a motor member and its shaft anda driving '12. The combination with the frame and wheel secured to andturning with the shaft thereof, and a base member on which the motormember is pivotally mounted, said motor member andbase member .coactingto cause the motor wheel to yieldingly and drivingly. engage the machine'wheel and' thebase member to clampingly engage the frame of themachine. I I 13; The combination with the frame and the wheel of-amachine to be driven, of a motor member and its shaft and a drivingwheel secured to' and turning with the shaft thereof, acbase memberpositioned below the .motor member, {a pivot pin pivotally connectingthe motor'member to the base -member, and a-coiled spring surrounding athe pivot pin and coacting with both memhers to cause the motor wheeltoyieldingly and drivingly engage the machine wheel and the base'member toclampingly engage the frame of the machine. a

14. The combination with the frame and the wheel of a machine to bedriven, of a 'motor member and-its shaft and a driving wheel secured toand turnin with the shaft, a. base member having a p urality ofsupportengaging portions extending in different horizontal planes, saidbase-member also provided with eyed ears, a motor member havingaitransversely extending pivot pin which extends through the eyed earsand pivotally connects the motor member to 1 the'base member, said motormember also having a yielding friction driving wheel, and a coiledspring surrounding the pivot pin and having one of its ends engaging thebase member and the other end engaging the 'motormember for yieldinglytilting the motor wheel into engagement with the ma- "chine wheel andthe base member clampingly into. engagement with the machine frame. v

15. The combinationwith the frame and the wheel of a machine to'bedriven, the lower portion of said wheel being positioned above a portionof the frame, of ajmotor member and its shaft and a driving wheel.secured to and turning with-the shaft there- FREDERICK J, OSIUS.

